Darkglass MICROTUBES B3K V2 Bass Preamp PedalSame Tube like Overdrive with Even More Tone Shaping Power Darkglass's line of preamps and overdrive pedals are taking the bass world by storm. Their popular B3K V2 keeps the same grind as the original design and adds the ability to restore the mid frequencies. Now you can send your bass rig into meltdown without losing any clarity. If you're looking to add grind to your tone while maintaining your tonal core, you can't go wrong with the Darkglass B3K